<!-- 商品评论模块 -->
<template>
    <div class="goods-comment">
        <div class="head" v-if="commentInfo">
            <!-- 好评率 购买人数 -->
            <div class="data">
                <p><span>{{ commentInfo.salesCount }}</span><span>人购买</span></p>
                <p><span>{{ commentInfo.praisePercent }}</span><span>好评率</span></p>
            </div>
            <!-- 评论类别筛选 -->
            <div class="tags">
                <div class="dt">大家都在说：</div>
                <div class="dd">
                    <a v-for="(item, i) in commentInfo.tags" :key="item.title" href="javascript:;"
                        :class="{ active: currTagIndex === i }" @click="changeTag(i)">
                        {{ item.title }}（{{ item.tagCount }}）
                    </a>
                </div>
            </div>
        </div>
        <!-- 排序 -->
        <div class="sort" v-if="commentInfo">
            <span>排序：</span>
            <a @click="changeSort(null)" href="javascript:;" :class="{ active: reqParams.sortField === null }">默认</a>
            <a @click="changeSort('praiseCount')" href="javascript:;"
                :class="{ active: reqParams.sortField === 'praiseCount' }">最热</a>
            <a @click="changeSort('createTime')" href="javascript:;"
                :class="{ active: reqParams.sortField === 'createTime' }">最新</a>
        </div>
        <!-- 评论列表 -->
        <div class="list">
            <div class="item" v-for="item in commentList" :key="item.id">
                <!-- 用户信息 -->
                <div class="user">
                    <img :src="item.member?.avatar || 'https://i.postimg.cc/rmH9S2mx/image.png'" alt="">
                    <span>{{ formatNickname(item.member?.nickname || '超级小白白') }}</span>
                </div>
                <!-- 评论信息 -->
                <div class="body">
                    <div class="score">
                        <!-- 橙色星星 -->
                        <i v-for="i in item.score" :key="i + '1'" class="iconfont icon-wjx01"></i>
                        <!-- 白色星星 -->
                        <i v-for="i in 5 - item.score" :key="i + '2'" class="iconfont icon-wjx02"></i>
                        <span class="attr">{{ formatSpecs(item.orderInfo?.specs) }}</span>
                    </div>
                    <!-- 评论内容 -->
                    <div class="text">{{ item.content }}</div>
                    <!-- 评论图片 -->
                    <GoodsCommentImage v-if="item.pictures.length" :pictures="item.pictures"></GoodsCommentImage>
                    <!-- 评论时间 -->
                    <div class="time">
                        <span>{{ item.createTime }}</span>
                        <span class="zan"><i class="iconfont icon-dianzan"></i> {{ item.praiseCount }}</span>
                    </div>
                </div>
            </div>
        </div>
        <!-- 分页 -->
        <XtxPagination @current-change="changePager" :total="total" :current-page="reqParams.page"  />
    </div>
</template>
<script>
import { findCommentInfoByGoods, findCommentListByGoods } from '@/api/goods'
import { ref, inject, reactive, watch } from 'vue'
import GoodsCommentImage from './goods-comment-image.vue'
const getCommentInfo = (goods) => {
    const commentInfo = ref(null)
    findCommentInfoByGoods(goods.value.id).then(data => {
        // type 的目的是将来点击可以区分点的是不是标签
        data.result.tags.unshift({ type: 'img', title: '有图', tagCount: data.result.hasPictureCount })
        data.result.tags.unshift({ type: 'all', title: '全部评价', tagCount: data.result.evaluateCount })
        commentInfo.value = data.result
    })
    return { commentInfo }
}
export default {
    name: 'GoodsComment',
    components: {
        GoodsCommentImage
    },
    setup() {
        const goods = inject('goods')
        const { commentInfo } = getCommentInfo(goods)
        // 记录当前激活的索引
        const currTagIndex = ref(0)
        // 筛选条件准备
        const reqParams = reactive({
            page: 1,
            pageSize: 10,
            hasPicture: null,
            tag: null,
            sortField: null
        })
        // 改变排序
        const changeSort = (type) => {
            reqParams.sortField = type
            reqParams.page = 1
        }
        // 评论类别筛选
        const changeTag = (i) => {
            currTagIndex.value = i
            const currTag = commentInfo.value.tags[i]
            if (currTag.type === 'all') {
                reqParams.hasPicture = false
                reqParams.tag = null
            } else if (currTag.type === 'img') {
                reqParams.hasPicture = true
                reqParams.tag = null
            } else {
                reqParams.hasPicture = false
                reqParams.tag = currTag.title
            }
            reqParams.page = 1
        }

        // 初始化或者筛选条件改变后，获取列表数据。
        const commentList = ref([])
        const total = ref(0)
        watch(reqParams, async () => {
            const data = await findCommentListByGoods(goods.value.id, reqParams)
            commentList.value = data.result.items
            total.value = data.result.counts
        }, { immediate: true })

        // 定义转换数据的函数（对应vue2.0的过滤器）
        const formatSpecs = (specs) => {
            if (specs) {
                return specs.reduce((p, c) => `${p} ${c.name}：${c.nameValue}`, '').trim()
            }
            return
        }
        const formatNickname = (nickname) => {
            if (nickname) {
                return nickname.substr(0, 1) + '****' + nickname.substr(-1)
            }
            return
        }
        // 改变分页函数
        const changePager = (np) => {
            reqParams.page = np
        }
        return {
            total,changePager,
            commentInfo, currTagIndex, changeTag, changeSort, reqParams, commentList, formatSpecs, formatNickname
        }
    }
}

</script>
<style scoped lang="less">
.goods-comment {
    .head {
        display: flex;
        padding: 30px 0;

        .data {
            width: 340px;
            display: flex;
            padding: 20px;

            p {
                flex: 1;
                text-align: center;

                span {
                    display: block;

                    &:first-child {
                        font-size: 32px;
                        color: @priceColor;
                    }

                    &:last-child {
                        color: #999;
                    }
                }
            }
        }

        .tags {
            flex: 1;
            display: flex;
            border-left: 1px solid #f5f5f5;

            .dt {
                font-weight: bold;
                width: 100px;
                text-align: right;
                line-height: 42px;
            }

            .dd {
                flex: 1;
                display: flex;
                flex-wrap: wrap;

                >a {
                    width: 132px;
                    height: 42px;
                    margin-left: 20px;
                    margin-bottom: 20px;
                    border-radius: 4px;
                    border: 1px solid #e4e4e4;
                    background: #f5f5f5;
                    color: #999;
                    text-align: center;
                    line-height: 40px;

                    &:hover {
                        border-color: @xtxColor;
                        background: lighten(@xtxColor, 50%);
                        color: @xtxColor;
                    }

                    &.active {
                        border-color: @xtxColor;
                        background: @xtxColor;
                        color: #fff;
                    }
                }
            }
        }
    }

    .sort {
        height: 60px;
        line-height: 60px;
        border-top: 1px solid #f5f5f5;
        border-bottom: 1px solid #f5f5f5;
        margin: 0 20px;
        color: #666;

        >span {
            margin-left: 20px;
        }

        >a {
            margin-left: 30px;

            &.active,
            &:hover {
                color: @xtxColor;
            }
        }
    }

    .list {
        padding: 0 20px;

        .item {
            display: flex;
            padding: 25px 10px;
            border-bottom: 1px solid #f5f5f5;

            .user {
                width: 160px;

                img {
                    width: 40px;
                    height: 40px;
                    border-radius: 50%;
                    overflow: hidden;
                }

                span {
                    padding-left: 10px;
                    color: #666;
                }
            }

            .body {
                flex: 1;

                .score {
                    line-height: 40px;

                    .iconfont {
                        color: #ff9240;
                        padding-right: 3px;
                    }

                    .attr {
                        padding-left: 10px;
                        color: #666;
                    }
                }
            }

            .text {
                color: #666;
                line-height: 24px;
            }

            .time {
                color: #999;
                display: flex;
                justify-content: space-between;
                margin-top: 5px;
            }
        }
    }
}
</style>